Figure | Scheme and experimental setup. (IMAGE)
Caption
Figure | Scheme and experimental setup. a, The dynamics of light with resonator under periodic electro-optic modulation. Each resonant peak of the resonator, separated by the FSR ΩR, hosts a series of frequency-lattice sites selected by low-frequency RF signal ΩR. By coupling the intra-resonant frequency sites of two resonators, complex lattice models can be engineered. The lattice network incorporates three types of couplings: local modulation on the resonator (green), along with DC (yellow) and RF (blue) signals applied to the MZI. b, Schematic of setup for detecting band structures and photon distribution on sites. Three DC+RF signal sets are applied via Bias-Tees to ground-signal-ground (GSG) electrodes, controlling resonators (S1, S3) and MZI (S2). The RF signal is generated by a microwave source or an arbitrary waveform generator (AWG), and is connected to a power amplifier before connected to the Bias-Tees. The letter pairs (A1, A2 ~ F1, F2) denote transmission connections between the panels for electrical circuits and optical paths. Band structure detection employs a Δω -detuned probe laser, with time-resolved transmittance (revealing quasi-momentum slices) captured by a photodetector (PD) and oscilloscope. The top-right figure presents a characteristic band structure reconstructed from temporally stacked transmittance spectra. The acousto-optic modulator (AOM) is used in the heterodyne detection optical path to shift the frequency of a portion of the incident laser, and the site distribution measurements utilize the heterodyne optical path with a PD.
Credit
Yi-Tao Wang et al.
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CC BY